Apparatus for wound therapy
A wound therapy apparatus is disclosed that includes a wound interface securable to a skin surface around a wound bed to form an enclosed space over the wound bed that is fluid-tight. The wound therapy apparatus may include a dressing engaged with the wound interface to contact the wound bed. A spacer may be disposed within the enclosed space proximal of the dressing to define a plenum between portions of the wound interface and a proximal side of the dressing. Gas within the enclosed space may have an O 2 concentration greater than the O 2 concentration in atmospheric air. The dressing may include a hydrophobic material, a hydrophilic material, or a distal layer comprised of silicone having fenestrations therein, in various aspects. The pressure p 0 within the enclosed space may vary over a pressure range P min ≤P 0 ≤P max . Related methods of use are also disclosed.
1. A wound therapy apparatus, comprising:
a wound interface adapted to be secured to a skin surface around a wound bed to form an enclosed space over the wound bed that is fluid-tight;
a lumen passing through the wound interface to fluidly communicate with the enclosed space;
a dressing disposed within the enclosed space, a distal side of the dressing adapted to contact the wound bed;
a spacer disposed proximal to the dressing and within the enclosed space; and
a plenum defined within the spacer, the plenum in fluid communication with the lumen and with a proximal side of the dressing.
2. The apparatus of claim 1 , further comprising:
a gas within the enclosed space having an O 2 concentration greater than the O 2 concentration of atmospheric air.
3. The apparatus of claim 1 , wherein a pressure within the enclosed space is temporally varied by fluid communication with the enclosed space through the lumen.
4. The apparatus of claim 3 , wherein a maximum pressure within the enclosed space is within a pressure range of from +0.1 mm Hg to +5 mm Hg with respect to ambient pressure.
5. A wound therapy apparatus, comprising:
a wound interface securable to a skin surface around a wound bed to form an enclosed space over the wound bed that is fluid-tight;
a lumen passing through the wound interface to fluidly communicate with the enclosed space;
a dressing disposed within the enclosed space, a distal side of the dressing adapted to contact the wound bed; and
a plenum defined by a spacer disposed within the enclosed space between a proximal side of the dressing and a distal side of the wound interface.
6. The apparatus of claim 5 , further comprising:
a gas within the enclosed space having an O 2 concentration greater than the O 2 concentration of atmospheric air.
7. The apparatus of claim 5 , wherein a pressure within the enclosed space temporally varies by fluid communication with the enclosed space through the lumen.
8. The apparatus of claim 7 , wherein a minimum pressure within the enclosed space is within a pressure range of from −40 mm Hg to −150 mm Hg.
9. The apparatus of claim 7 , wherein a maximum pressure within the enclosed space is within a pressure range of from +0.1 mm Hg to +5 mm Hg.
10. The apparatus of claim 7 , wherein the pressure within the enclosed space-temporally varies within a pressure range of from −150 mm Hg to +40 mm Hg with respect to ambient pressure by fluid communication with the enclosed space through the lumen.
11. The apparatus of claim 5 , wherein the distal side of the dressing is comprised of silicone.
12. The apparatus of claim 11 , further comprising:
fenestrations formed in the silicone to communicate fluid through the silicone.
13. The apparatus of claim 5 , further comprising:
a second lumen passing through the wound interface to fluidly communicate with the enclosed space.
14. The apparatus of claim 5 , further comprising:
a liquid medicament disposed within the enclosed space for delivery to the wound bed.
15. The apparatus of claim 5 , further comprising:
a medicament disposed within the dressing for delivery to the wound bed.
16. The apparatus of claim 5 , further comprising:
a port that cooperates with the wound interface for delivery of medicament into the enclosed space.
17. A wound therapy apparatus, comprising:
a wound interface securable to a skin surface around a wound bed to form an enclosed space over the wound bed that is fluid-tight;
a means for communicating a fluid with the enclosed space;
a means for contacting the wound bed; and
a means for communicating the fluid between the means for communicating a fluid with the enclosed space and the means for contacting the wound bed.